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View Full Version : How to find amps using farads and voltage



jonathanbdenham
May 27, 2015, 01:37 PM
can someone explain how you find amps using only farads and voltage?

secretsquirrel
December 12, 2017, 01:44 PM
can someone explain how you find amps using only farads and voltage?

I assume you are referring to a purely capacitive circuit. You need to use the farads to find XsubC. XsubC = 1/(2(pi)fc). If you assume 60 hertz, you can find XsubC with only the farads. In a purely capacative circuit, XsubC is your only impedance, so you can plug that right into E=IZ to find your current.

JamesM
October 21, 2019, 12:53 PM
can someone explain how you find amps using only farads and voltage?

If you have frequency you can get Xc (the resistance of the capacitor)

1/(2piFC) = Xc

where F is Frequency
C is Capacitance

then use Ohms law I=V/R or in this case I=V/Xc

If you don't have frequency I'm not sure how you'd do it.